names function in r

I. Batch build folder, bulk Read folder nameToday, the work encountered a problem: Boss gave us more than 200 companies ID code (such as 6007, 7920, etc.), need to search for the download news according to these ID numbers, so that the download to

ObjectiveAt the beginning of the contact with the R language, you will hear a variety of R language use skills, the most important one is not to use the loop, the efficiency is particularly low, to use vector computing instead of cyclic

This article corresponds to the "R Language Programming Art" chapter 2nd: Vectors; Chapter 3rd: matrices and Arrays; chapter 4th: list; 5th: Data frame; 6th chapter: Factors and tables==================================================================

Explore Python Tornado framework support for subdomain names and wildcard domain names, pythontornado In fact, Tornado's support for subdomain names and wildcard Domain Names (except in particular, the following subdomain names and wildcard domain

This article mainly introduces the support of the Python Tornado framework for subdomain names and wildcard domain names. Tornado, as a typical asynchronous framework, is very popular among Python developers, for more information, see Tornado's

ObjectiveThis article is translated from Paul Torfs & Claudia Brauer's article A (very) short introduction to R. One of the more simple places without translation, not good in Chinese description of the place is not translated.1. Introduction and

I. Three methods for obtaining function namesInstance 1: One method seen in the js authoritative guide: Function. prototype. getName = function (){Return this. name | this. toString (). match (/function \ s * ([^ (] *) \ (/) [1]} Instance 2: If the

The latest version of this article has been updated to: http://thinkinside.tk/2013/05/09/r_notes_2_data_structure.html Although R is object-oriented, I personally think that the so-called objects in R are only a structure (struct ). You still need

1. File System IntroductionThe R language operates on file systems, including file operations and directory operations, and function APIs are defined in the base package.2. Directory Operations2.1 View CatalogView subdirectories under the current

1.R Language Programming features 1.1 R language data structure The R language data structure appears in the form of data types, with data boxes, arrays, vectors and matrices, factors, and lists. Data frame dataframe is a common data set in